Global Patent Index - EP 0974206 A1

EP 0974206 A1 2000-01-26 - METHOD AND APPARATUS FOR FREEING A FRAME TO AID IN HANDOFF DETERMINATION IN A CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM

Title (en)

METHOD AND APPARATUS FOR FREEING A FRAME TO AID IN HANDOFF DETERMINATION IN A CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM

Title (de)

VERFAHREN UNG GERÄT FÜR RAHMENBEFREIUNG ZUR ERLEICHTERUNG EINER STEUERUNGSÜBERTRAGUNG IN EINEM KOMMUNIKATIONSSYSTEM MIT MEHRFACHZUGRIFF DURCH KODEVERSCHACHTELUNG

Title (fr)

PROCEDE ET APPAREIL PERMETTANT DE LIBERER UNE TRAME AFIN DE FACILITER LA DETECTION D'UN TRANSFERT DE CONTROLE DANS UN SYSTEME DE COMMUNICATIONS A ACCES MULTIPLE PAR REPARTITION DE CODE

Publication

EP 0974206 A1 (EN)

Application

EP 98906535 A

Priority

  • US 9803125 W
  • US 82794297 A

Abstract (en)

[origin: WO9847242A1] A mobile station (106) in a code division multiple access (CDMA) communication system (100) implements scanning of pilot channels on a different frequency by reserving a periodic frame on the forward channel to allow the mobile station (106) to change frequencies and scan for other pilot channels. To preserve some aspects of voice quality, both the base station (102) and mobile station (106) voice encode speech at a maximum of half rate and transmit the information as secondary traffic prior to the frame where the mobile station (106) scans the alternate frequency. To maximize the trade-off between voice quality and frequency of the scan, the base station (102) indicates to the mobile station (106) the period between other frequency scans via messaging. To ensure compatibility, this method can be negotiated via known service configuration negotiation techniques.

IPC 1-7 (main, further and additional classification)

H04B 7/216; H04Q 7/00

IPC 8 full level (invention and additional information)

H04W 36/08 (2009.01); H04W 28/06 (2009.01)

CPC (invention and additional information)

H04W 36/0094 (2013.01)

Designated contracting state (EPC)

DE FI GB SE

EPO simple patent family

WO 9847242 A1 19981022; BR 9807961 A 20000308; CA 2286179 A1 19981022; CA 2286179 C 20020507; CN 1136674 C 20040128; CN 1269079 A 20001004; DE 69823656 D1 20040609; DE 69823656 T2 20041007; EP 0974206 A1 20000126; EP 0974206 A4 20020116; EP 0974206 B1 20040506; JP 2002510442 A 20020402; KR 100344053 B1 20020720; US 5970058 A 19991019

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